package com.ruoyi.common.utils.file;

import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.Locale;
import java.util.Objects;

import com.ruoyi.common.utils.sign.Md5Utils;
import org.apache.commons.io.FilenameUtils;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
import com.ruoyi.common.exception.file.FileSizeLimitExceededException;
import com.ruoyi.common.exception.file.InvalidExtensionException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.uuid.IdUtils;

/**
 * 文件上传工具类
 *
 * @author ruoyi
 */
public class FileUploadUtils
{
    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = 100 * 1024 * 1024;

    /**
     * 默认的文件名最大长度 100
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 100;

    /**
     * 默认上传的地址
     */
    private static String defaultBaseDir = RuoYiConfig.getProfile();

    public static void setDefaultBaseDir(String defaultBaseDir)
    {
        FileUploadUtils.defaultBaseDir = defaultBaseDir;
    }

    public static String getDefaultBaseDir()
    {
        return defaultBaseDir;
    }

    /**
     * 以默认配置进行文件上传
     *
     * @param file 上传的文件
     * @return 文件名称
     * @throws Exception
     */
    public static final String upload(MultipartFile file) throws IOException
    {
        try
        {
            return upload(getDefaultBaseDir(), file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String upload(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 根据文件路径上传(新性诱）
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String uploadXYImage(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return uploadXYImage(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String uploadFile(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return uploadFile(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String uploadFileWithoutExtract(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return uploadFileWithoutExtract(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }
    /**
     * 文件上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final String uploadFile(String baseDir, MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException
    {
        int fileNamelength = Objects.requireNonNull(file.getOriginalFilename()).length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file, allowedExtension);
        // 原图加标签
        String[] fileName = extractFilename(file);
        // 保存原图
        String absPath = getAbsoluteFile(baseDir, fileName[1]).getAbsolutePath();
        file.transferTo(Paths.get(absPath));

        String pathFileName = getPathFileName(baseDir, fileName[1]);

        // 操作备份图 thumbnail 缩略图
//        String thumbnailImg = addThum(fileName[0]);
//        ImageCompressUtils.compressPicForSize(getAbsoluteFileName(baseDir,fileName[1]),getAbsoluteFileName(baseDir,thumbnailImg));
        return pathFileName;
    }

    /**
     * 文件上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final String upload(String baseDir, MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException
    {
        int fileNamelength = file.getOriginalFilename().length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file, allowedExtension);

        // 原图加上标签
        String[] fileName = extractFilename(file);

        // 保存原图
        File desc = getAbsoluteFile(baseDir, fileName[1]);
        file.transferTo(desc);

        String pathFileName = getPathFileName(baseDir, fileName[1]);

        // 操作备份图 thumbnail 缩略图
        String thumbnailImg = addThum(fileName[0]);

//        System.out.println("thumbnailImgPath:" + thumbnailImg);
//        System.out.println("原图片地址:" + getAbsoluteFileName(baseDir,fileName[1]));
//        System.out.println("目标图片地址:" + getAbsoluteFileName(baseDir,thumbnailImg));

        // 备份图存为压缩图片
        ImageCompressUtils.compressPicForSize(getAbsoluteFileName(baseDir,fileName[1]),getAbsoluteFileName(baseDir,thumbnailImg));

        return pathFileName;
    }
    /**
     * 文件上传(新性诱)
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final String uploadXYImage(String baseDir, MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException
    {
        int fileNamelength = file.getOriginalFilename().length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file, allowedExtension);

        // 原图加上标签
        String[] fileName = extractFilename(file);

        // 保存原图
        File desc = getAbsoluteFile(baseDir, fileName[1]);
        file.transferTo(desc);

        String pathFileName = getXYPathFileName(baseDir, fileName[1]);

        // 操作备份图 thumbnail 缩略图
        String thumbnailImg = addThum(fileName[0]);

//        System.out.println("thumbnailImgPath:" + thumbnailImg);
//        System.out.println("原图片地址:" + getAbsoluteFileName(baseDir,fileName[1]));
//        System.out.println("目标图片地址:" + getAbsoluteFileName(baseDir,thumbnailImg));

        // 备份图存为压缩图片
        ImageCompressUtils.compressPicForSize(getAbsoluteFileName(baseDir,fileName[1]),getAbsoluteFileName(baseDir,thumbnailImg));

        return pathFileName;
    }

    /**
     * 文件上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final String uploadFileWithoutExtract(String baseDir, MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException
    {
        int fileNamelength = Objects.requireNonNull(file.getOriginalFilename()).length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file, allowedExtension);
        // 原图加标签
//        String[] fileName = extractFilename(file);
        // 保存原图
        String filename = file.getOriginalFilename();
//        String extension = getExtension(file).toLowerCase();
//        String finalfilename = filename + "." + extension;
        String absPath = getAbsoluteFile(baseDir, filename).getAbsolutePath();
        file.transferTo(Paths.get(absPath));

        String pathFileName = getPathFileName(baseDir, filename);

        // 操作备份图 thumbnail 缩略图
//        String thumbnailImg = addThum(fileName[0]);
//        ImageCompressUtils.compressPicForSize(getAbsoluteFileName(baseDir,fileName[1]),getAbsoluteFileName(baseDir,thumbnailImg));
        return pathFileName;
    }

    /**
     * 添加 thumbnail 标签
     */
    private static String addThum(String srcPath){
        String res = "";
        if (StringUtils.isNotNull(srcPath)){
            String[] str = new String[2];
            /* \\. 转义字符，相当于 . ,分隔出.前后的内容 */
            str = srcPath.split("\\.");
            res = str[0] + "__thum." + str[1];
        }
        return res;
    }

    /**
     *  ********** 修改 ***********
     * 编码文件名
     *  返回两个文件名，第一个 为普通文件生成名， 第二个带 original（原图标志位）
     */
    public static final String[] extractFilename(MultipartFile file)
    {
        String fileName = file.getOriginalFilename();
        String extension = getExtension(file).toLowerCase();
        fileName = DateUtils.datePath() + "/" + IdUtils.fastUUID();

        String[] fileNames = new String[2];
        fileNames[0] = fileName + "." + extension;
        fileNames[1] = fileName + "__original" + "." + extension;
        return fileNames;
    }

    private static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException
    {
        File desc = new File(uploadDir + File.separator + fileName);

        if (!desc.getParentFile().exists())
        {
            desc.getParentFile().mkdirs();
        }
        if (!desc.exists())
        {
            desc.createNewFile();
        }
        return desc;
    }
    private static final String getPathFileName(String uploadDir, String fileName) throws IOException {
        int dirLastIndex = RuoYiConfig.getProfile().length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        String pathFileName = Constants.RESOURCE_PREFIX + "/" + currentDir + "/" + fileName;
        return pathFileName;
    }

    private static final String getXYPathFileName(String uploadDir, String fileName) throws IOException {
        int dirLastIndex = RuoYiConfig.getXYProfile().length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        String pathFileName = Constants.RESOURCE_PREFIX_XY + "/" + currentDir + "/" + fileName;
        return pathFileName;
    }

    /**
     * 文件大小校验
     *
     * @param file 上传的文件
     * @return
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws InvalidExtensionException
     */
    public static final void assertAllowed(MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, InvalidExtensionException
    {
        long size = file.getSize();
        if (DEFAULT_MAX_SIZE != -1 && size > DEFAULT_MAX_SIZE)
        {
            throw new FileSizeLimitExceededException(DEFAULT_MAX_SIZE / 1024 / 1024);
        }

        String fileName = file.getOriginalFilename();
        String extension = getExtension(file);
        if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension))
        {
            if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension,
                        fileName);
            }
            else
            {
                throw new InvalidExtensionException(allowedExtension, extension, fileName);
            }
        }

    }

    /**
     * 判断MIME类型是否是允许的MIME类型
     *
     * @param extension
     * @param allowedExtension
     * @return
     */
    public static final boolean isAllowedExtension(String extension, String[] allowedExtension)
    {
        for (String str : allowedExtension)
        {
            if (str.equalsIgnoreCase(extension))
            {
                return true;
            }
        }
        return false;
    }

    /**
     * 获取文件名的后缀
     *
     * @param file 表单文件
     * @return 后缀名
     */
    public static final String getExtension(MultipartFile file)
    {
        String extension = FilenameUtils.getExtension(file.getOriginalFilename());
        if (StringUtils.isEmpty(extension))
        {
            extension = MimeTypeUtils.getExtension(file.getContentType());
        }
        return extension;
    }

    /**
     * 获取文件在磁盘中的绝对路径
     * @param fileName 生成的文件相对路径
     * @return
     */
    private static final String getAbsoluteFileName(String uploadDir, String fileName){

        return uploadDir + "/" + fileName;
    }
}
